J. Physiol. Biochem., 57 (4), 343-344, 2001 Verapamil sensitisation to alkaloids on colchicine-selected human colon adenocarcinoma cells exposed to different drug doses for 1 hour(MDR), the main cause of failure in canceruntil colony formation. The effect of ver-extrusion of the antineoplastic drugs fromapamil as a drug sensitiser was performedby the exposure of colon cells to differ